Tuesday, 23 December 2014

Asteroid 2001 XY10 passes the Earth.

Asteroid 2001 XY10 passed by the Earth at a distance of about 18 540 000
km (48.22 times the average distance between the Earth and the
Moon, or 12% of the average distance between the Sun and the Earth), at
about 11.00 am GMT on Monday 22 December 2014. There was no
danger of the asteroid hitting us, though were it to do so it would have
presented a serious threat. 2001 XY10 has an estimated
equivalent diameter of 260-820 m (i.e. it is estimated that a spherical
object with the same volume would be 260-820 m in diameter), and an
object of this size would be predicted to be capable of passing through
the Earth's atmosphere relatively intact, impacting the ground with an
energy equivalent to about 600- 20 000 megatons of TNT (roughly 35 000-1 175 000
times the energy of the Hiroshima bomb). Such an event
would result in a crater between 4 and 12 km across, cause devastation
on a global scale and would have the potential to affect the climate
globally for decades or even centuries after the impact event.

2001 XY10 has a 297 day orbital period, with an elliptical orbit tilted
at an angle of 31° to the plain of the Solar System which takes in to
0.53 AU from the Sun (53% of the distance at which the Earth orbits the
Sun, considerably inside the orbit of Venus) and out to 1.21 AU (21% further away from the Sun than the Earth).
This means that close encounters between the asteroid and Earth are
fairly common, with the last thought to have happened in May 2011 and
the next predicted in July 2015. Although it does cross the Earth's
orbit and is briefly further from the Sun on each cycle, 2001 XY10
spends most of its time closer to the Sun than we are, and is therefore
classified as an Aten Group Asteroid.

Asteroid 2014 KF39 passed by the Earth at a distance of 16 780 000 km
(43.68 times the average distance between the Earth and the Moon, or
11.2
%
of the average distance between the Earth and the Sun)...

Asteroid 2014 WM365 passed by the Earth at a distance of 8 165 000 km
(21.26 times the average distance between the Earth and the Moon, or 5.4
%
of the average distance between the Earth and the Sun)...

Asteroid 2014 WD497 passed by the Earth at a distance of 6 144 000 km
(15.95 times the average distance between the Earth and the Moon, or 4.1
%
of the average distance between the Earth and the Sun)...

No comments:

Post a Comment

About Me

Studied Palaeobiology & Evolution at the University of Portsmouth, Geosciences via the Open University & Ecology and Conservation at Christchurch University, Canterbury.
Have worked in wildlife based tourism, mineral exploration, development, conservation, education & environmental chemistry. Occasionally write articles for papers and magazines.

This Blog would be impossible without the work of countless scientists (and others) throughout the world. Where possible I do my best to credit them, but there will always be many more who remain unmentioned; this does not imply I am ungrateful for their contributions. Any errors or inaccuracies are, of course, my own.